What is the anatomy of core muscles?

The core muscles support the spine and provide stability.

Serratus posterior superior

The serratus posterior muscles extend obliquely from the vertebral column to the rib cage. During breathing, this muscle helps lift the ribs.

Rhomboid major

The rhomboids are two bilateral, superficial muscles located in the upper back. This muscle links the shoulder blade to the ribcage.

Erector spinae

The erector spinae muscles comprise the intermediate layer of the deep (intrinsic) muscles of the back This group of three muscles forms a supporting column on either side of the spine.

Serratus posterior inferior

The serratus posterior inferior muscle is one of the back’s two intermediate muscles (the other is called the serratus posterior superior muscle), which means it’s neither a surface nor a deep muscle. During breathing, this muscle helps pull the lower ribs down.

External intercostals muscle

The external intercostal muscles are the most superficial set of muscles that occupy the 11 intercostal spaces.  This pulls the ribcage up and out when breathing in. This is one of a set of muscles that raises the ribs and expands the chest.

Rotators

These small muscles run all the way up either side of the spine. Its function is related to the glenohumeral joint, where the muscles of the cuff function both as the executors of the movements of the joint and the stabilization of the joint as well.

Psoas major

Psoas major is a long, thick, fusiform muscle located in the lumbar region of the trunk lateral to the lumbar vertebrae and medial to the quadratus lumborum muscle. This muscle helps to move the hip.

Gluteal muscles

The gluteus maximus is the most superficial gluteal muscle that forms the prominence of the gluteal region. These muscles stabilize the hip, pelvis, and back.

Multifidus

Multifidus is a group of short, triangular muscles that along with the semispinalis and rotatores comprises the transversospinal group of deep back muscles. The joints of the lower back are stabilized by this long, thin muscle.

 

Picture Credit : Google